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4(x+13)

In order to react, particles must collide with sufficient energy. Particles with a temperature above 0K are always moving and colliding with each other.

J'ai une mère et un père. Ma mère est un institutrice et mon père est un ingénieur. Aussi j'ai un frère quite est un pharmacien. Je m'entends bien avec ma famille.

Ficks law outlines the factors that affect diffusion. Diffusion gradient is the difference in concentration of the molecule either side of the membrane, the greater the difference the faster the diffusion...

To factorise we must think what two numbers add up to 5 but times together to get 6. We know it is two numbers because it is x^(2). If it was x^(3) there could be 3 numbers, ect. We think what goes into 6...